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December 22, 2014

Homework Help: bobpursly, check please,math

Posted by jas20 on Sunday, February 25, 2007 at 11:04pm.

do you mean like this:

720/(V-30) + 720/(V+30) = 10

Get a common denominator of
(v-30)(v+30)
then multiplying both sides by that, then
(v-30)(v+30)X 720(V+30) + (v-30)(v+30) X 720(V-30)=(v-30)(v+30)X 10(v-30)(v+30)

then multily out, and solve for v.
720(v-30)+720(v+30)=10
720v-21600+720v+21600=10
1440v=10
v=144

The right side: you have to multipy both sides by (v-30)(v+30
720(v-30)+720(v+30)=10(v-30)(v+30)
You will get a quadratic.


As an aside, 1440v if it equalled 10, does not give v=144. It gives 1/144.

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